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United States Patent | 5,348,650 |
Cummings, Jr. | * September 20, 1994 |
A treating apparatus is shown for removing cloggants from the pores and surfaces of aeration diffuser elements used in an activated sludge treatment process or the like. The apparatus pumps a liquid acid solution through the aeration piping network of the system and out through the diffusers for reacting the acid with the cloggants in the pores of the diffusers. After the cleaning action has been completed, the apparatus produces an agitation throughout the diffuser system being cleansed as the liquid acid is being pumped out of the system and the air flow is being reestablished.
Inventors: | Cummings, Jr.; Paul W. (Worcester, MA) |
Assignee: | Aeration Engineering Resources Corporation (Worcester, MA) |
[*] Notice: | The portion of the term of this patent subsequent to September 24, 2008 has been disclaimed. |
Appl. No.: | 715390 |
Filed: | June 14, 1991 |
Current U.S. Class: | 210/199; 134/170; 210/220 |
Intern'l Class: | C02F 003/20 |
Field of Search: | 210/620-627,750,752,754,758,220,170,199 261/122,DIG. 70 134/29,39-41,170 |
Re33177 | Mar., 1990 | Schmit et al. | 210/754. |
2684330 | Jul., 1954 | French | 210/8. |
2686138 | Aug., 1954 | Klein | 134/15. |
2826209 | Mar., 1958 | Klein | 134/70. |
3150007 | Sep., 1964 | Kovachy | 134/4. |
4238244 | Dec., 1980 | Banks | 134/22. |
4382867 | May., 1983 | Schmit et al. | 210/754. |
4402758 | Sep., 1983 | Hobbs | 134/3. |
4419141 | Dec., 1983 | Kunkel | 134/22. |
Manual of Practice No. 5, "Air Diffusion in Sewage Works", Federation of Sewage & Industrial Wastes Assn.; pp. 48-62 (1952). |